IOT Multiple Choice Questions and Answers – Sending and Receiving Data in Real Time Through Internet

Questions

1 _________ allows us to control electronic components

A RETful API

B RESTful API

C HTTP

D MQTT

View Answer

Answer: RETful API

2 MQTT stands for _____________

A MQ Telemetry Things

B MQ Transport Telemetry

C MQ Transport Things

D MQ Telemetry Transport

View Answer

Answer: MQ Telemetry Transport

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3 MQTT is better than HTTP for sending and receiving data.

A True

B False

View Answer

Answer: True

4 MQTT is _________ protocol.

A Machine to Machine

B Internet of Things

C Machine to Machine and Internet of Things

D Machine Things

View Answer

Answer: Machine to Machine and Internet of Things

5 Which protocol is lightweight?

A MQTT

B HTTP

C CoAP

D SPI

View Answer

Answer: MQTT

6 PubNub publishes and subscribes _________ in order to send and receive messages.

A Network

B Account

C Portal

D Keys

View Answer

Answer: Keys

7 By clicking which key the PubNub will display public, subscribe, and secret keys.

A Pane

B Demo Keyset

C Portal

D Network

View Answer

Answer: Demo Keyset

8 The messageChannel class declares the _________ class attribute that defines the key string.

A command_key

B command-key

C commandkey

D Key_command

View Answer

Answer: command_key

9 _________ method saves the received arguments in three attributes.

A __Init

B Init__

C __Init__

D _init_

View Answer

Answer: __Init__

10 _________ and _________ saves the publish and subscribe keys that we have generated with the PubNub Admin portal.

A public_key and subscribe_key

B Public-key and subscribe-key

C publickey and subscribekey

D Key_public and key_subscribe

View Answer

Answer: public_key and subscribe_key

11 _________ specifies the function that will be called when there is a new message received from the channel.

A Reconnect

B Error

C Connect

D Callback

View Answer

Answer: Callback

12 _________ specifies the function that will be called on an error event.

A Callback

B Error

C Connect

D Reconnect

View Answer

Answer: Error

13 _________ Specifies the function that will be called when a successful connection with the PubNub cloud.

A Callback

B Error

C Connect

D Reconnect

View Answer

Answer: Connect

14 _________ specifies the function that will be called when a successful re-connection is completed.

A Callback

B Error

C Connect

D Reconnect

View Answer

Answer: Reconnect

15 ___________ specifies the function that will be called when the client disconnects.

A Callback

B Error

C Connect

D Disconnect

View Answer

Answer: Disconnect

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